Same thing happened to me. I used a incense in a park in Miami and it popped up. The Venusaur was about 1200+ CP, something around there. We had this long battle but he fucking ran. Niantic needs to take this feature out the game. Makes me so mad that rare pokemon can escape pokeballs and run so easily.

Someone literally fuck me up the asshole as I was watching this I decide to go on Pokémon go and a fucking venasour was at my city hall FUCCKKKK he’s my favorite fucking Pokémon and it’s 2 in the fucking morning so I can’t leave 😭😭😭😭